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Vishay Semiconductors VOMHA43A Automotive High-Speed Couplers

Vishay Semiconductors VOMHA43A Automotive High-Speed Couplers are automotive‑grade optocouplers that integrate a GaAlAs infrared LED with an optically coupled photodetector and a high‑speed transistor. The photodetector is junction‑isolated from the transistor to minimize Miller capacitance effects, enhancing switching performance. With an open‑collector output, the Vishay VOMHA43A couplers allow engineers to easily tailor load conditions for compatibility with various logic families, including TTL and CMOS. A built‑in Faraday shield on the detector chip provides excellent rejection of high common‑mode transient voltages, ensuring reliable signal integrity in electrically noisy environments. Engineered for demanding automotive systems, the VOMHA43A is well‑suited for communication bus isolation (such as CAN, LIN, I2C, and SPI) as well as for isolated driver applications, including intelligent power module (IPM) gate‑drive circuits.

Features

  • AEC-Q102 automotive qualified
  • Integrated photo detector and a high-speed transistor
  • Wide -40°C to +125°C temperature range
  • Very high 50kV/μs common-mode transient immunity
  • Up to 20V flexible open collector output
  • Faraday shield on the detector chip
  • High Current Transfer Ratio (CTR) at low drive currents
  • Stable CTR over the temperature range
  • Optimized for low drive currents
  • High isolation, small outline, and stackable package
  • Pending agency approvals
    • UL1577
    • cUL
    • CQC
    • DIN EN 60747-5-5 (VDE 0884-5)
  • Lead-free, Halogen-free, and RoHS-compliant

Applications

  • Automotive communication bus interfaces (CAN, LIN, I2C, SPI)
  • Automotive IPM drivers
  • Ground signal isolation
  • Logic voltage level translation
  • Highly reliable industrial applications

Specifications

  • Input
    • 7V maximum reverse voltage
    • 30mA maximum DC forward current
    • 1A maximum surge forward current
    • 80mW maximum power dissipation
    • 1.1V to 1.7V input forward voltage range
    • 10μA maximum input reverse current, 0.001μA typical
    • 30pF typical capacitance
    • -1.4mV/°C to -0.9mV/°C forward voltage temperature coefficient range
  • Output
    • -0.5V to 30V maximum supply voltage range
    • -0.5V to 20V maximum output voltage range
    • 8mA maximum output current
    • 100mW maximum power dissipation
    • 50μA to 350μA typical logic low supply current range
    • 1μA to 2.5μA maximum logic high supply current range
    • 0.5V maximum logic low output voltage
    • 0.5μA to 5μA maximum logic high output current range
  • 0.4pF typical coupler capacitance (input-output)
  • 24% to 100% current transfer ratio range
  • -40°C to +125°C ambient temperature range
  • +140°C maximum junction temperature
  • +260°C maximum soldering temperature
  • Switching
    • 0.6μs to 10μs propagation delay time range to logic low at output
    • 0.03μs to 10μs propagation delay time range to logic high at output
    • 0.45μs to 0.85μs maximum pulse width distortion range
    • 0.5μs to 0.9μs maximum propagation delay difference between any two parts
  • Safety and insulation
    • 40/125/21 climatic classification per IEC 68 part 1
    • Pollution degree 2
    • 400 comparative tracking index
    • 4000VRMS maximum rated withstanding isolation voltage
    • 6000Vpeak maximum transient isolation voltage
    • 707Vpeak maximum repetitive peak isolation voltage
    • 350mW output safety power
    • 150mA input safety current
    • +175°C input safety temperature
    • ≥5mm creepage/clearance distance
    • ≥0.4mm insulation thickness

Schematic

Schematic - Vishay Semiconductors VOMHA43A Automotive High-Speed Couplers

Dimensions

Mechanical Drawing - Vishay Semiconductors VOMHA43A Automotive High-Speed Couplers
Published: 2026-03-03 | Updated: 2026-03-16